User Community
Open Source Software
Programming Education
We unfortunately don't have manpower to teach people programming and duplicate every piece of documentation out there.
Dave has suggested these websites for Training in C++ which is the most basic skill required. In any case they should be bookmarked and studied.
We also do not have energy, time, resources, whatever, to maintain the outdated toolchain, dependencies and know-how. However all the build instructions are updated for the current master and that is what developers should use. Versions other than the current Release are just history!